The Alexander Dennis Enviro400 is a 2-axle double-decker bus built by Alexander Dennis from late 2005. It is designed as the replacement of the Alexander ALX400 and the Plaxton President body. The Enviro400 was designed by TransBus International until its collapse and reformation as Alexander Dennis. The Enviro400, like the other products in the Enviro range, is a complete bus, but the body is also available on the Volvo B7TL/B9TL and Scania N230UD chassis for sale in the UK market. The Enviro400 chassis can also be built with body by other manufacturers.